99159474 Grundfos DDE Series Digital Dosing Pump, Type Key: DDA 120-7 AR-SS/T/SS-F-31A3A3BG. 3/4″ x 3/4″ NPT Female Connection, 100-240 Volts, 60 Hz, 1 Ph (Single Phase), Stainless Steel Dosing Head, Stainless Steel Valve Ball, PTFE Gasket. 31.7 GPH Max Flow, 102 PSI Max Pressure, 122 °F Max Operating Temp. Control Variant A with alarm relay and analog input (DDA, DDC) w/Front-Mounted Control Panel & Standard Valve.